Modelling And Simulation of Shunt Active Power Filter For Power Quality Improvement

Abstract

Nowadays, power electronics devices are mostly used everywhere like domestic application, industry utilization and commercial application throughout the world [1-2]. Most of the power electronics devices are non-linear load such as variable frequency drives (VFD), personal computers, arc furnaces, switch mode power supplies (SMPS), converters and so on which led to power quality problems like voltage sag, voltage fluctuation, noises, flickering and so on [3-4]. When the current waveform does not follow the voltage waveform, it is referred as a non-linear load. Insulation failures, electrical device heating, power losses, interface problems in communication systems, and worst-case electrical power system failures are all caused by harmonic distortions on the distribution side. [5]. Therefore, eliminating the power quality issues are a big challenge for both utility and customer [6]. Furthermore, current-related power quality issues are mostly caused by harmonics, inadequate reactive power, and unbalanced loads [7]. SAPF is considered to be one of the most effective methods for achieving higher levels of power quality. By generating equal and opposite magnitude of harmonic current at PCC, SAPF is employed to inject compensating current and reduce the harmonics [8]. While performing the adopted approach, it should be noted that, the THD should not exceed 5%, as adopted by IEEE standard [9].